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UploaderMultipartHandler.java
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UploaderMultipartHandler.java
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/*
* D3Backend
* Copyright (C) 2015 - 2017 Dries007 & Double Door Development
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.doubledoordev.backend.web.http;
import net.doubledoordev.backend.server.Server;
import net.doubledoordev.backend.util.Helper;
import net.doubledoordev.backend.util.methodCaller.IMethodCaller;
import org.glassfish.grizzly.ReadHandler;
import org.glassfish.grizzly.http.io.NIOInputStream;
import org.glassfish.grizzly.http.multipart.ContentDisposition;
import org.glassfish.grizzly.http.multipart.MultipartEntry;
import org.glassfish.grizzly.http.multipart.MultipartEntryHandler;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* @author Dries007
*/
public class UploaderMultipartHandler implements MultipartEntryHandler
{
private static final String FILENAME_ENTRY = "fileName";
private final IMethodCaller caller;
private final Server server;
private final File folder;
public UploaderMultipartHandler(IMethodCaller caller, Server server, File folder)
{
this.caller = caller;
this.server = server;
this.folder = folder;
}
@Override
public void handle(final MultipartEntry multipartEntry) throws Exception
{
final ContentDisposition contentDisposition = multipartEntry.getContentDisposition();
final String name = contentDisposition.getDispositionParamUnquoted("name");
// If part contains file
if (name.equals(FILENAME_ENTRY))
{
final String filename = contentDisposition.getDispositionParamUnquoted("filename");
final NIOInputStream inputStream = multipartEntry.getNIOInputStream();
server.logAction(caller, "Uploading file " + filename + " to " + Helper.getRelativeString(server.getFolder(), folder));
// start asynchronous non-blocking content read.
inputStream.notifyAvailable(new UploadReadHandler(new File(folder, filename), inputStream));
}
else
{
multipartEntry.skip();
}
}
/**
* Simple {@link org.glassfish.grizzly.ReadHandler} implementation, which is reading HTTP request
* content (uploading file) in non-blocking mode and saves the content into
* the specific file.
*/
private static class UploadReadHandler implements ReadHandler
{
private final NIOInputStream inputStream;
private final FileOutputStream fileOutputStream;
private final byte[] buf;
private UploadReadHandler(final File file, final NIOInputStream inputStream) throws FileNotFoundException
{
fileOutputStream = new FileOutputStream(file);
this.inputStream = inputStream;
buf = new byte[2048];
}
@Override
public void onDataAvailable() throws Exception
{
readAndSaveAvail();
inputStream.notifyAvailable(this);
}
@Override
public void onAllDataRead() throws Exception
{
readAndSaveAvail();
finish();
}
@Override
public void onError(Throwable t)
{
finish();
}
private void readAndSaveAvail() throws IOException
{
while (inputStream.isReady())
{
fileOutputStream.write(buf, 0, inputStream.read(buf));
}
}
private void finish()
{
try
{
fileOutputStream.close();
}
catch (IOException ignored)
{
}
}
}
}